From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Add more supported primitives in libgccjit IR (was: Shrinking the C core) Date: Mon, 21 Aug 2023 15:20:35 +0300 Message-ID: <83cyzgvb70.fsf@gnu.org> References: <20230809094655.793FC18A4654@snark.thyrsus.com> <83fs4dwwdo.fsf@gnu.org> <874jkt90a5.fsf@localhost> <87y1i57jqi.fsf@localhost> <87pm3h7h8k.fsf@localhost> <87h6ot7cf3.fsf@localhost> <87edjx7c0b.fsf@localhost> <831qfxw2cx.fsf@gnu.org> <87v8d95918.fsf@localhost> <87zg2lav4b.fsf@yahoo.com> <87sf8d57wf.fsf@localhost> <87r0nxatu1.fsf@yahoo.com> <87pm3h56ig.fsf@localhost> <87edjxarhz.fsf@yahoo.com> <87edjw4uw4.fsf@localhost> <77daee02cf1ba0db70c1@heytings.org> <87v8d8fzr9.fsf@localhost> <87jztofwqm.fsf@localhost> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="12299"; mail-complaints-to="usenet@ciao.gmane.io" Cc: ams@gnu.org, gregory@heytings.org, luangruo@yahoo.com, emacs-devel@gnu.org To: Ihor Radchenko , Andrea Corallo Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Mon Aug 21 14:21:22 2023 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1qY3uM-000309-NO for ged-emacs-devel@m.gmane-mx.org; Mon, 21 Aug 2023 14:21:22 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qY3tM-0005LR-Cb; Mon, 21 Aug 2023 08:20:20 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qY3tK-0005L5-KG for emacs-devel@gnu.org; Mon, 21 Aug 2023 08:20:18 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qY3tJ-0000NP-TT; Mon, 21 Aug 2023 08:20:18 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=ahE0aNpYWnHd6KmluHQYGeZklEFabZTue7+S3+PZ/qc=; b=QYipxpfcX9EZ Z4C9XQiyQF9Vy9v6gL9t8CaSOkcDS/LyMBrqJa13IwRHcKvB2AKr6nlw9kn/FHeU/KxE8ikpKureL y98Q1F/9jiH0UD45FbAwIc70X3GEDtRFVky90hRvHHgCG3MgB20rfub3VIEgMP85JxqfILZeZ5rQN YUql/FDL+ylqVoLqWjtWKjxxE/n5y7pzmmcW2Tt2s13VP5ofB4v9epzI2MLVbNXWb5O/XnaQYWJMn 27bMfk0cSRdSoK3v9ZKF0LDjQvjsrV2/Ps6+Zo9U/AVw0CWbTjNGmI3az+mOolV2hsM26CANbPzAi I+v4ZmcT1VYkdkMUZ04kVg==; In-Reply-To: <87jztofwqm.fsf@localhost> (message from Ihor Radchenko on Mon, 21 Aug 2023 11:41:53 +0000) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.devel:309068 Archived-At: > From: Ihor Radchenko > Cc: gregory@heytings.org, luangruo@yahoo.com, akrl@sdf.org, eliz@gnu.org, > incal@dataswamp.org, emacs-devel@gnu.org > Date: Mon, 21 Aug 2023 11:41:53 +0000 > > "Alfred M. Szmidt" writes: > > > > Look at data.c:arith_driver. You'll see that it's essentially a function > > > which dispatches the handling of its arguments depending on their type... > > > > > > These integer/float/bignum types are not known at compilation time ... > > > > This is not correct. If you have something like > > (progn (setq x 1) (> x 2)), compiler is actually able to determine the > > type of X at compilation time. > > > > It is absolutley correct, the Emacs compiler is not capable of doing > > what you are suggesting. There are no specific functions for fixnum > > comparison in Emacs Lisp, nor is the Emacs Lisp compiler capable of > > being instructed to do such specific things. I've been repeating this > > constantly now. That is needed to make programs faster in Lisp. > > I can see > > /* > Define a substitute for Fadd1 Fsub1. > Currently expose just fixnum arithmetic. > */ > > static void > define_add1_sub1 (void) > > in comp.c > > So, there is some type-specific optimization going on. > It looks very limited though. This discussion is almost useless without Andrea on board, and you are using hist stale email address. Please use the one I used here instead. And I really suggest that people wait for Andrea to chime in, before discussing code that he wrote and still maintains very actively.